Window structure



Filed March 22,

Oct. 19, 1948. I

I F. F. BEIL WINDOW STRUCTURE 2 Sheets-Sheet 1 I A 30 32 i i 6 INVENTOR.

' O -'1 1948.. F. F. BEIL. I 2,4

. wmnow STRUCTURE 2 Sheets-Sheet 2 File dflarch 22; 1944 Patented Oct. 19, 1948 WINDOW s'rRi'Jo'rUnE.

Forrest F. Beil, Clinton, Iowa, assignor to Curtis Companies Incorporated, Clinton, Iowa, a corporation of Iowa Application March 22, 1944, Serial No. 527,520

My present invention relates to a window structure wherein an effective weather seal is provided, including a composite element, one part of which is wood, plastic or other suitable material and the other part a resilient element, for instance metal.

One object of my invention is to provide a window structure having a simple and inexpensive weather seal connection between the sliding sides of the sashes and the side lambs of the window frame, the connection including a sealing bar which floats in a channel of the jamb, and a resilient weather strip back of it serving the double purpose of sealing the space between the bar and the jamb, and biasing the bar to engage the window sashes.

Another object is to provide a sealing bar which may be made of wood, plastic, or other suitable material, and when pressed against the sides of window sashes will seal thereagainst regardless of a differential in the widths of the sashes caused by unequal swelling thereof, and which at the same time is effectively sealed as to the space between the sealing bar and the side J'amb of the window.

Still another object is to provide a structure in which the resilient weather strip member and the sealing bar may be readily put in place without nails, screws or other fastenings and without the aid of any tools.

A further object is to provide a window structure wherein the sashes may then be assembled in the window frame merely by snapping them into place without requiring the use of tools, subsequent removable of the sashes being accomplished in a minimum of time by snapping them out again. My structure thereby enables a carpenter to install a window in its frame in a fraction of the time heretofore necessary with usual types.

A further object is to provide a sealing bar that floats freely in a channel of a side jamb whereby it may be resiliently urged by a weather strip to engage the window sashes and effect a complete seal with both sashes under all conditions.

An additional object is to provide a sealing bar that so coacts with the sashes that the sashes may swell and shrink without substantially diminishing the effectiveness of the seal between the bar and the sashes.

Another additional object is to provide a resilient weather strip engaging a sealing bar throughout its entir length and thus effectively sealing it against infiltration of air. behind the 7 Claims. (01. 20-524) bar, the weather strip being entirely enclosed and concealed and not subject to slidable friction, its sealing and resilient properties being thus not affected by corrosion. I thereby secure the ad- Vantage of a wood to wood sliding connection and a metal weather stripping without sliding of any parts of either the sashes or the window frame against the weather strip itself.

Another object is to provide such a sealing bar and weather strip which cooperate with the springs in a spring hung window so as to hold the sashes in an position to which they may be raised or lowered.

Still a further object is to provide a window of the kind described whereby the use of the usual parting stop is eliminated and the total thickness of the Window is reduced to permit its use in modern thin wall construction.

and with side jamband sashes that are provided with grooves so as to accomplish the foregoing objects.

With these and other objects in view, my invention consists in the construction, arrangement and combination of the various parts of my device whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims and illustrated in the accompanying drawings, wherein:

Fig. 1 is a vertical sectional view through a window structure embodying my invention.

Fig. ;2 is a horizontal sectional view on the line 2-2 of Fig. 1.

Fig. 3 is a sectional perspective view through a window frame and the sashes therein, wherein is illustrated my weather sealing connection between the jamb and the sashes.

. Fig. 4 is a vertical sectional view on the line 4-'-4 of Fig. 1 showing how the sealing bar of my window structure is installed and held against displacement; and

Fig. 5 is a diagrammatic view somewhat similar to Fig. 2 and enlarged thereover to show the action of the sealing bar and weather strip in the case of unequal swelling of the sashes, the action being shown exaggerated.

0n the accompanying drawings, I have used the reference numeral 10 to indicate a sill, i2 a head jamb, and I 3 a side jamb of a window frame of the double hungtype. These elements may be of the usual construction such as shown in Madsen Patent No. 1,889,752 which is shown as of spring hung type. The springs in the present in stance are illustrated at M.

An upper sash U and a lower sash L are illustrated and these include stiles I5 and I6 respectively. The stiles I5 are each provided with a groove H (see Fig. 2), and the stiles I6 are provided with similar grooves I8. Only one side of the window frame has been shown in Fig. 2, and the opposite side is identical, but of course reversed. The stiles I5 and It also have rabbets I 9 and 20.

The upper and lower sashes U and L fit between the side jambs It with plently of play illustrated at 2|. This permits of maximum swelling of the parts without binding of the sashes with respect to the window frame during the lowering and raising thereof.

To seal the space 2 I, however, has been a problem attacked by many inventors. Metal weather strips are quite commonly used. My invention, however, contemplates the use of a sealing bar B having three beads 22 thereon to fit; the outer two in the grooves I1 and I8 of the sashes, and the center one in both rabbets I9 and 20 as shown in Fig. 2. This arrangement, when the bar B is biased to move toward the left in Fig. 2, provides an effective seal for the space 2|. While the sealing bar preferably has three beads, the center one may be omitted or additional'beads may be included if desired.

The jamb I3 is channeled as illustrated at 23 to loosely receive the bar B, and a double 2- shaped metal weather strip 24 is placed in the channel back of the bar. The weather strip thereby seals the space around the sides of the bar and across its back against air infiltration, and at the same time provides the desiredresiliency to bias the bar B toward engagement of the beads 22 in the grooves I1 and I8, and the 'rabbets I9 and 20. The double Z shape of the weather strip 24 also distributes th pressure so that both outer beads of the bar B are biased in the desired direction, that is, toward the sashes. The weather strip may vary in construction or be made in a plurality of parts, the prime essential being that it shall seal the back of the bar thruout its entire length and provide continuous pressure all the way along the bar. Accordingly, the bar is fioatingly mounted, yet sealed relative to the sashes and the side jamb, and due to the bead arrangement, twists on its vertical axis to accommodate unequal swelling of the sashes I5 and I6. In such event, the outer beads 22 follow the grooves I! and I8, rocking in them even though they may be offset from each other due to such unequal swelling (see Fig. 5). The bar may float toward and from the bottom of the channel 23 and between its sides.

The bar B is preferably made of hardwood and coated with a water repellent, a well as impregnated with a suitable lubricant if desired. It may also be coated with an oily substance or the like, that causes paint to chip off if, during the painting of the window, the paint accidentally gets onto the sealing bar. Preferably, of course, there should be no paint whatever on the sealing, bar, nor in the grooves or rabbets of the sashes, as it seriously interferes with proper sliding and sealing of the parts with relation to each other. If there should be any accidental sticking of the sash to the frame due to paint, the bond can be easily broken by reason of the floating mounting of the sash and sealing bars.

At the head jamb I2 (Fig, 11) a bar B may be used as a seal when the upper sash is closed, and so that the same groove l1 and rabbet I9 in the upper rail 21 of the upper sash U can be used as 4 in the stiles of the sash. Th bar B may be shaped like a part of the bar B and received snugly in a channel 28 of the head jamb I2.

The installation of the sashes in the frame is a comparatively simple matter consisting merely of first placing the sealing bar B in the groove 28 of the jamb l2 and using a nail or two to hold it there or depending on friction to hold it in position. The two weather strips 24 are then placed in the grooves 23 of the side jambs I3 and the sealing bars B inserted. These bars are notched as indicated at 22a in Fig. 4 to coact with retainers 23a which are small sheet metal clips secured to the sill II]. The bar B is bowed to the dotted shape shown, its upper end inserted in position, and then its lower end inserted so that when the bar is released and straightens, its overall length increases so that the notch 22a receives the clip 23a. The end of the bar B and the clip 23a are positioned so as to permit the sealing bar B to move toward the sash, maintaining spring pressure thruout the length of the sash even though the sash may shrink.

The next step in the assembling operation is to place one side of the upper sash U against its sealing bar, push the sash in the direction toward that bar, then swing the other side of the sash into the window frame while pushing against the other sealing bar B and the second side of the sash will snap into position and be retained by the sealing bar. The lower sash is then similarly inserted and all of this takes but a minimum of time. During the insertion of the sashes, one spring I4 is hooked to the first side and then after the sash is snapped into position the other spring is installed and all of these operations take but a few minutes. Finally,the inner side stops 25 are installed and secured by a few nails or screws.

My type of sealing bar B also permits ready removal of the sashes when desired. The inner side stop 25 may be removed, after which the sashes can merely be snapped out of position. By pushing one of the sashes toward one side jamb, there is enough play permitted for the opposite side of the sash to be snapped out of position with respect to the bar B. This holds true for both sashes, and facilitates their removal from the inside of the building, as for replacing the glass, after removing only one element of the window frame.

The weather strip 24 is designed to produce an effective weather seal between the bar B and the jamb I3, and at the same time provide the desired resiliency to maintain the floating action of the bar B and it effective weather sealing coaction with th sashes. In rare instances of bowed lambs, the proper sealing contact would be maintained thruout the entire'height of the window.

Even when the sashes swell or shrink unevenly proper sealing contact of the bar with the sashes is maintained as illustrated in Fig, 5. In this figure the lower sash L has swelled more than the upper sash U. Accordingly the outer two beads 22 of the sealing bar B still maintain proper contact due to action of the weather strip 24 which has individual leaves-for each bead. The center bead 22 serves merely as a substitute for the usual blind stop without requiring the space usually provided for one and thus permits cutting down the overall thickness of the window frame for modern thin wall construction. The weather strip 24 at the same time maintains an efiective weather seal back of the sealing bar or between the bar and the channel 28 in the jamb At the parting rails 30 and 3| of the sashes, I preferably provide a weather strip connection 32-43, one'el'em'ent of which is .U-shaped to receive a flange of the other. At theslll iii, a weather strip '34 may be used to coact with the rabbet 35 of the lower sash. These are shown in myPatent No.'2,33'7,63r3'.

.I have found that a wood to wood sliding contact maintains equal friction under most "all {conditions as distinguished from a metal to Wood or metalto metal sliding contact. Where metal weather strip is provided, and any wood part or metal to metal sliding contact. Where metal (which is almost impossible to prevent) results in a change in friction whereas concealing and enclosing the weather strip between a jamb and a floating sealing bar without any sliding contact between them results in maintaining the same friction under all conditions as well as eliminating from view an unsightly corroded weather strip. This is particularly important in connection with a spring hung window because the ideal condition is that both the upper sash and the lower sash when free of friction should balance at a position midway between full-down and full-up. The friction furnished should then be just enough to support the unsprung weight of the sash when it is up and to overcome the difference between the fully extended pull of the spring plus the weight of the sash when the sash is down.- A predetermined degree of friction is therefore desirable and (by having a wood to wood sliding contact) can be secured. If a metal to metal or metal to wood sliding contact is provided as in usual weather stripped constructions, any corrosion subsequent to install-ation results in an undesirable increase in friction. My wood to wood sliding contact, therefore, has a particular advantage in cooperation with a spring hung window.

The ends of the sealing bar B and the clips 23a limit the movement of the sealing bars B for an additional purpose other than merely to keep them in place during assembly of the sashes. When both sashes are up, the clips 23a prevent the lower ends of the sealing bars from being moved so far toward each other that they come out of the side jamb channels 23 and expose the weather strip therein to view. Similarly the ends of the bar B limit movement of the upper ends of the bars B when both sashes are down.

Some changes may be made in the construction and arrangement of the parts of my device without departing from the real spirit and purpose of my invention, and it is my intention to cover by my claims any modified forms of. structure or use of mechanical equivalents which may be reasonably included within their scope without sacrificing any of the advantages thereof.

I claim as my invention:

1. In a window structure, a side jamb having a channel, a pair of sashes slidable relative thereto, and a weather seal between said side jamb and said sashes comprising a sealing bar floatingly movable toward and from the bottom and between the walls of said channel, said sealing bar having rounded tongue and groove coaction with said sashes, said sashes having rounded rabbets in their adjacent edges, said bar having a central rounded tongue for cooperating with the rabbets and a resilient Z-shape-d weather strip in said 'iannel and urging said sealing bar toward said sashes adjacent the outer edges thereof.

- 6 2. In a window structure, a sidejamb having a channel, a pair of sashes slidable relative thereto, and a weather seal between said side jamb and said sashes comprising a sealing bar floatingly movable toward and from the bottom and between the walls of said channel, said sealingbar having rounded tongue and groove coaction with said sashes, said sashes having rounded rabbets in their adjacent edges, said'bar having a central rounded tongue for cooperating with the rabbets with a loose-fit and means urging said sealing bar toward said sashes and sealing the space between said bar and the walls of said channel.

-3.'Aiwindow structure of the character disclosed comprising a side jamb, upper and lower 'wood sashes slidable relative thereto and each having a groove and a rabbet, a wood sealing bar having a pair of beads to fit said grooves, and a center bead to lit in both of said rabbets, said side jamb having a channel therein receiving said sealing bar to float toward and from the bottom and between the walls of said channel, and a metallic strip in said channel for biasing said sealing bar toward said sashes whereby to seat said beads in said grooves and said rabbets under resilient pressure of the strip.

4. In a window structure, a side jamb, a pair of sashes slidable relative thereto, said side jamb having a channel, a sealing bar fioatingly received in said channel to move toward and from the bottom and between the sides of the channel, weather stripping having a central portion spanning said channel and V-shaped end portions biasing said sealing bar at its outer edges toward said sashes, and means at the top and bottom ends of said sealing bar to limit the amount of movement thereof under constraint of said weather stripping, said sealing bar having tongue and groove coaction with said sashes.

5. In a window structure, side jambs having channels, a pair of spring-hung wood sashes slidable relative thereto, and means for frictionally holding said sashes against movement when adjusted to any position in the window frame and for sealing the sides of the sashes relative to said side jambs, comprising wood sealing bars floatingly movable toward and from the bottom and between the sides of the channels of said jambs and having tongue and groove coaction with said sashes, and weather stripping concealed and enclosed in said channels with a central portion spanning the channel and double folded end portions engagingthe marginal edges of said sealing bars to bias them toward said sashes.

6. A window structure of the character described comprising side jambs, each having a longitudinal channel of substantially less width than the jamb, upper and lower sashes slidable relative to the jambs, each havin in each stile a rounded groove and a rounded rabbet adjacent the edge of the stile next to the other sash, wood sealing bars having rounded beads to fit said grooves and each having a rounded center bead to fit in the rabbets of the upper and lower sashes, each bar being floatingly projected into a channel to float toward and from the bottom and between the walls thereof, and resilient metal weather strips in said channels for biasing the adjacent sealing bar toward the adjacent sashes.

'7. In a window structure, a side jamb having a channel, a pair of sashes slidable relative thereto, and a weather seal between said side jamb and said sashes comprising a sealing bar floatingly movable toward and from the bottom and. between the sides of said channel, said sealing bar REFERENCES CITED The following references are of record in the file of this patent:

Number UNITED STATES PATENTS Name Date Staib July 26, 1898 Roberton Nov. 22, 1910 Dennis June 8, 1926 Blessin Oct. 16, 1934 Dautrick June 4, 1940 Goeliner Mar. 10, 1942 Adams et a1. Dec. 1, 1942 Starck Jan. 5, 1943 Rosewarne Jan. 19, 1943 Dautrick Mar. '7, 1944 

